Machine for coating core-bars.



No. 645,948. Patented Mar. 27, I900. M. H. FLETCHER.

MACHINE FOR COATING CORE BARS.

(Application filed June 3, 1899.) (No Model.) 2 Sheets-Sheet l No.645,948. Patented Mar. 27, I900. M. H. FLETCHER.

MACHINE FOB GOATING CORE BARS.

(Application filed June 8, 1899.) (No Model.) 2 Sheets-Sheet 2.

m: Ncmms zwzns co. mom-urns" WASNIN UNITED STATES PATENT OLEFFICE.

MORDECAI H. FLETCHER, OF CINCINNATI, OHIO.

MACHINE FOR COATING CORE-BARS.

sPEcIFicATIoN aiming art of Iietters Patent No. 645,948, dated. Math 27,19oo.

Application filed June 8, 1899. Serial No. 719,302. (No model.)

To all whom it may concern;

Be it known that LMORDEOAI H. FLETCHER, a citizen of the United States,residing-at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Machines forCoating Core-Bars, of which the following is a specification.

My invention relates to machines for placing layers of material in aplastic state upon" core-bars in building up core-surfaces for casting,and particularly layers of combustible or semicombustible material whichmay be covered by a final coating of loam, its object being to enablesuch layers to be placed upon core-bars in an economical and expeditious manner by unskilled persons, such as ordinarily employed insimilar work in pipefoundries, 85c.

To this end my invention consists in a machine constructed ashereinafter set forth, wherein open-meshed web of textile materialweighted at one end and propelled by a takeup roll at the other passesbeneath the corebar, carrying and applying the plastic material to thesame.

Certain other elements and features of usefulness are embodied in themachine, all as hereinafter more fully set forth.

Mechanism embodying my invention is illustrated in the accompanyingdrawings, in which- Figures 1 and 2 are opposite end elevations of amachine of preferred construction, showing the core-bar in positionundergoing treatment. Fig. 3 is a plan view of the same; Fig. 4, a planof the lever connections for locking the weight attached to the web atany point in its elevation, and Fig. 5 a diagram showing the relativepositions and indicating the functions of the parts immediatelyconcerned in applying the layer of plastic material to the core-bar.

Referring now to the drawings, A A designate the end pieces of thesupporting-frame, having corresponding bearings a: for the journal endsof rolls B O, leaving space between for a core-bar D, which intervenesin parallel relations. The journal of roll B at one end is extendedbeyond its bearings and provided with means for rotation. In theconstruction shown this consists ofa spurgear a, meshing with aspur-pinion (t set upon an adjacent stud d, projecting from the frameand provided with a hand-crank a and with a pawl 01, to be used asoccasion requires.

Midway between and below the bearingsn: at upon each end piece A and"covering a suit able recess in the latter is an open socket plate 2,secured adjustably to the end piece by bolts 2 and having a semicircularrecess into which project antifriction-rolls y, pivotally carried by theplate, all as shown in Figs. 1 and 2. These antifrictionn'olls furnish arolling support for the core-bar D while the latter is undergoingtreatment.

Secured at one end to the rollB, upon which it winds, is a web E,preferably of wire-cloth,

of suitable widthto cover the space desired. Winding forward over theroll B the web passes thence backward under the core-bar D, thence overthe roll 0, which is an idler, and downward to a weighted bar 20', towhich it is secured and by which it is held normally in tension and inconstant upward pressure against the core-bar D.

To resist the lifting tendency upon the corebar, there is provided ateach end a lever F,

pivoted at the rear of the end pieces A, passing over the core-bar,withwhich they contact through the medium of antifriction-rolls fjournaled in the lever, the forward end of each lever being engagedunder catch projections f to hold the core-bar in position during theoperation. A further provision for this purpose maybe used whennecessary to prevent the bending of the core-bar at the center,consisting of an arm 8, adjustablysecured, to the frame of the machineor to an independent standard S, as shown, and adapted to project overthe core-bar and carry one or more friction-rolls s contacting with it.

At the rear and secured to the end pieces A is a trough T, extending theentire length of the machine, to contain the material used. Its bottomis an apron whose front edge is about over the center of the rear roll0, a charge of material being brought forward by the attendant by meansof a suitable handboard or elongated scraper 13*.

The ends of the weightbar w are extended outward to enter approximatelyvertical slots 0 in the end frames A, the rear walls of each slot beingformed into downwardly-inclined teeth, as shown. These slots are placedslightly to the rear of the normal path of the weight -bar to, whichtherefore ordinarily passes up and down without interference with theteeth, but may be locked by moving the weight-bar rearward,so as to engage the teeth. This locking is accomplished upon occasion by two camsor flaps g, vertically pivoted in front of the bar to, which by theirrotation crowd the bar back and engage it with the toothed wall of theslots. The flaps are moved by a projecting arm g of one of the flapsengaging a hand-lever h and by a connecting-rod 9 extending from oneflap to the other, to cause motion of both simultaneously.

The remaining parts and the functions of the parts described will beunderstood from the following description of the mode of operation: Thecore-bar D is placed in its rollerbearing between the rolls B O, and theplates are set forward or backward by set-screws I. to bring thecore-bar into the proper relations with the roll 0 to secure the desiredthickness of the layer to be formed upon the core-bar. The levers F arethen brought down and secured and the weight-bar 10 released and allowedto hang normally free, said bar being of suitable weight to give thedesired tension upon the web E for the work to be performed. The pawl (tis then thrown 0E and the web E unwound to its full length. The materialin the trough T-such, for example, as the mixtures of combustible orsemieombustible material heretofore described by me in previous LettersPatent-is then brought forward in sufficient quantity by thehand-scraper P, Fig. 5, upon the web E between the roll 0 and core-barD, and as the roll B is rotated, winding the web forward, the latterrotates the core-bar and the roll 0, and the material is graduallycarried with it under the core-bar D, against which it is held withincreasing pressure, which presses out all surplus moisture from thematerial and forces its particles into close contact and enables thecementing agent to properly act in holding them together and to hold thelayer firmly to the core-bar. The excess of liquid is caught in asuitable trough T whence it may be drawn off and used again. Vhen thelayer is completed, the lever h is thrown back, which causes the flapsor cams g to crowd the bar 20 back into the notches of the slots 0,there looking the same. The fastening-levers F are released and the rollB being then rotated the web lifts the core-bar D into the positionshown in Fig. 2 convenient for removal. By substituting new plates ofproper size smaller-sized core-bars may be covered in the same machine;but in large plants a separate machine for each standard size ofcore-bar will be desirable.

I claim as my invention and desire to secure by Letters Patent of theUnited States- 1. In amachine for applying layers of plastic material tocore-bars, the combination of a take-up roll, an idler or web suspendingroll, a web secured to the take-up roll and passed over saidsuspending-roll, a weight on the free end of said web, catch mechanismfor said weighted end of the web, and adjustablymounted antifrictionroller-bearings located beneath a portion of said web, between and belowthe take-up roll and suspending-roll, for the reception and rotation ofa core-bar to be placed on said web, substantially as set forth.

2. In a machine for applying layers of plastic material to core-bars,the combination of a frame, a take-up roll and a web-suspending rollmounted in said frame in the same horizontal plane, roller-bearingsadjustably mounted on the end pieces of said frame between and below thetake-up roll and suspending-roll, a web secured to the take-up roll andpassed over said suspending-roll, a weighted bar attached to the freeend of said web, and lever mechanism for holding down a core-bar placedon said web and roller-bearings, substantially as set forth. 3. In amachine for applying layers of plastic material to core-bars, thecombination of a take-u p roll, a web-suspending roll mounted in thesame horizontal plane with said takeup roll, a web secured to thetake-up roll and passed over the suspending-roll, a weight attached tothe free end of said web, open socket-plates adj usta'bly mounted belowsaid rolls and provided between the same with antifriction-rollers forreception and rotation of a core-bar to be placed on said web, and adjustable holding-down levers for securing the core-bar against thelifting tension of the web, substantially as set forth.

4. In a machine for applyinglayers of plastic material to core-bars, thecombination of the take-up roll, the web-suspending roll, a web havingone end secured to the take-up roll and its other end weighted andpassed over said suspending-roll, the said take-up roll andsuspending-roll being journaled in the same horizontal plane, adjustablerollerbearings mounted below and intermediate said take-up roll andweb-sus pending roll for reception and rotation of a core-bar, means forlocking the weighted end of the web at any position, levers for holdingdown the core bar on the said web and roller-bearings, and means forrotating the take-up roll, substan tially as set forth.

5. In a machine of the character indicated, the combination of thetake-up roll, the suspensionroll, the web having one end attached to thetake-up roll and its other end depending from the suspension-roll, theweight-bar attached to the free end of said web, the toothed guideway tobe engaged by said weight-bar, and means for moving the weightbar intoengagement with the teeth of the guideway as a holding-catch for theweb, substantially as set forth.

6. In a machine of the character described, the combination of thetake-up roll and suspension-roll mounted in the same horizontal plane,the intervening adjustable roller-bearings for reception and rotation ofa core-bar, a web secured at one end to the take-up roll and having itsother end passed over the suspension-roll and provided with aweight-bar, means for locking said weight-bar at any position, thefeed-trough discharging onto said Web over the suspension-roll, and thecatcht-rough located below the web, substantially as set forth.

7. In a machine of the character indicated, the combination of the framehaving end pieces provided with Vertical toothed guideslots, the take-uproll, the suspension-roll, a web secured to the take-up roll and passedover the suspension-roll and provided at its suspended end with aweight-bar, cams for acting on said weight-bar to engage it with theteeth of said guide-slots, and a hand-lever and connections foroperating said cams, substantially as set forth.

8. In a machine of the character indicated, the combination of thetake-up roll and idlerroll mounted in the same horizontal plane, aWoven-wire web secured to the take-up roll and passed over the idlerroll, a weight-bar attached to the free end of said web-roller, bearingslocated below the web and between the take-up and idler rolls forreception and rotation of a core-bar, afeed-trough discharging on saidweb, and a catch-trough located below the Web, substantially as setforth.

9. In a machine of the character indicated, the combination of thetake-up roll and the idler-roll mounted in the same horizontal plane, anopen-mesh web secured to the takeup roll and suspended over saididler-roll, roller-bearings intermediate said take-up roll andidler-roll for reception and rotation of a core-bar, a feed-troughdischarging on said web, a catch-trough located below said web, andmeans for pulling the web in tension to press plastic material againstthe core-bar and squeeze out surplus moisture, substantially as setforth.

In testimony whereof I affix my signature in presence of two witnesses.

MORDEOAI II. FLETCHER Witnesses:

FREDK. E. NIEDERHELMAN, L. M. HOSEA.

